When riding your bike at night, a front bike light is necessary. Front bike lights mount to your handlebars and typically offer several bright LEDs for visibility.
Rear Bike Lights
Most rear bike lights work in a flashing or fixed mode. Rear lights mount to the seat post and can act as a reflector when the light is off.
Bike Light Batteries
LED bike lights typically run on AA or AAA batteries. Higher-end bike lights run on lithium batteries and are rechargeable.
Additional Lighting Systems
Additional lighting systems can make biking at night safer by increasing your visibility. Additional lights can mount to your helmet, backpack or bike frame.
Reflectors are not sufficient for nighttime bicycle riding. At minimum, use a front and rear bicycle light, and for added visibility, mount a light to your helmet, backpack or bike frame.